JP2607089B2 - Ultrasonic fish net - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an ultrasonic fishnet which generates ultrasonic waves by applying a voltage to a fishnet main body incorporating a ceramic piezoelectric vibrator and to which oysters and algae do not adhere. It is about.

[Prior art] A circular net is surrounded by a net near the coast, the upper end of the net is floated, a lower net is attached to a fixed net which is submerged on the bottom, and fish such as hamachi are put in the net. Is being done.

[Problems to be Solved by the Invention] By the way, oysters and algae are inexpensive to those put in the sea, and in particular, these oysters and algae are cheap to those put 2 to 3 m from the sea surface. Therefore, oysters and algae are also inexpensive on fixed nets, and oysters and algae are tightly attached to the part 2-3 m below the sea surface with a width of several meters, and the mesh is formed within one month at the earliest and at the latest in 2-3 months. Is so close. Here, fish such as hamachi migrate around the sea surface, but there is a problem in that the clogging of the net near the sea surface causes a lack of oxygen in the net, so that the fish choke.

In order to solve this problem, drugs have been applied to the fixed net, but since this drug dissolves into the sea and affects other fish and shellfish, this drug is currently banned. It is.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a cylindrical ceramic piezoelectric vibrator in which an outer electrode is mounted on an outer surface and an inner electrode is mounted on an inner surface. Through a built-in rope, connect the conductive wire of the rope to the outer electrode and the inner electrode of the ceramic piezoelectric vibrator to form a rope covered with an insulator around the ceramic piezoelectric vibrator. The knitting of the vertical and horizontal nets constitutes a fish net main body such that the ceramic piezoelectric vibrator is attached to one side of the mesh, and an AC voltage is applied to the piezoelectric vibrator through the conductive wire of the fish net main body. Is applied.

[Operation] According to the present invention, an AC voltage is applied to the ceramic piezoelectric vibrator of the fishnet main body, an ultrasonic wave is always generated from the ceramic piezoelectric vibrator, and oysters and algae adhere to the fishnet main body and the surrounding fishnet. To prevent you from doing so.

FIG. 1 is a plan view of an ultrasonic fish net according to an embodiment of the present invention. A knot 3 is provided at an intersection of a vertical rope 1 and a horizontal rope 2 to form a net. 3, a ceramic piezoelectric vibrator 4 is mounted. As shown in FIG. 2, the ceramic piezoelectric vibrator 4 is formed in a cylindrical shape, and an outer electrode 5 and an inner electrode 6 are formed inside and outside the cylinder, respectively. The wires 7 and 8 are twisted, and the coated conductors 7 and 8 connect the piezoelectric vibrator 4 to the outer electrode 5 and the inner electrode 6 by conductors 9 and 10, respectively. Then, at least the periphery of the piezoelectric vibrator 4 is covered with an insulator 11 such as neoprene. The insulator 11 may cover the entire net provided with the piezoelectric vibrators 4.

As shown in FIG. 3, the fish net main body 12 of the present embodiment having such a configuration is formed at a plurality of portions of at least a portion where the oysters and algae are easily attached to the fixed net 14 whose upper end is floated by the float 13 as shown in FIG.
And a power source containing a built-in oscillator, a battery, and the like, which float on the sea surface via a rope 15 in which the coated conductive wires 7, 8 are twisted.
When a voltage is applied to the fish net body 12 from 16, ultrasonic waves are emitted from the piezoelectric vibrator 4, so that oysters and algae do not adhere to the fish net main body 12, and seawater flows through the fish net main body 12, Fish do not suffocate.

In addition, when the stationary net 14 is viewed from above as shown in FIG. 4, the stationary net 14 is installed in a substantially rectangular or square shape, and the fish net bodies 12a and 12b and 12c and 12d are formed on the stationary net 14 so as to face each other, For example, the power supply 16a is driven to
a, 12c, emits ultrasonic waves, receives the emitted ultrasonic waves by the fish net bodies 12b, 12d, respectively, and transmits the data by an RF oscillator and an antenna built in the power supply 16b, thereby transmitting the ultrasonic waves at a remote location. By receiving the data, the state of the fish school inside the fixed net 14 can be monitored.

FIG. 5 is a side view of an ultrasonic fish net according to another embodiment of the present invention, in which a temperature sensor 17 is provided at least at one or more places, for example, at the upper, middle or lower end of a stationary net 14 provided with a fish net main body 12. And the RF sensor in which the temperature sensor 17 is provided in the power supply 16
The temperature of seawater may be detected by an oscillator.

Further, a PH sensor may be provided in place of the temperature sensor 17, and a dissolved oxygen amount sensor may be provided in place of the temperature sensor 17. Two or more of these sensors may be provided on the stationary net 14.

In the above embodiment, a battery is built in the power supplies 16, 16a, and 16b. However, the battery may be driven by a solar cell, or a battery and a solar cell may be used in combination. When the shore is near, a power supply 16 and power supplies 16a and 16b with built-in oscillators and the like are provided on the shore, and the power supplies 16, 16a and 16b are connected to the ultrasonic fish net by a rope 15 in which the coated conductive wires 7 and 8 are twisted. 12 piezoelectric vibrators 4 or temperature sensors 17, PH
You may make it connect with a sensor or a dissolved oxygen sensor.

Further, in the above embodiment, the fish net body 12 is provided in a part of the fixed net 14, but it goes without saying that it may be provided in the whole. Further, the piezoelectric vibrators are mounted vertically and horizontally between the meshes of the fish net body 12, but the piezoelectric vibrators may be mounted on one of the vertical and horizontal ropes between the meshes. In addition, by generating ultrasonic waves that are preferred by fish by changing the frequency, it is also effective in growing fish schools in a fixed net. Further, the fish net body 12 may be put in the sea to capture a school of fish, and may be used for guiding fish by changing the frequency.

[Effects of the Invention] As is clear from the above description, the present invention constitutes a fishnet main body by incorporating a piezoelectric vibrator in a net, applying an AC voltage to the incorporated piezoelectric vibrator, Since the sound waves are generated to prevent oysters and algae from adhering to the fish net, there is an advantage that the fish school such as a fixed net can be used for monitoring and guidance of the school of fish without choking. .

[Brief description of the drawings]

FIG. 1 is a plan view of a fish net body of an ultrasonic fish net according to one embodiment of the present invention, and FIGS. 2 (a) and (b) are an enlarged view and a sectional view of a part of the ultrasonic fish net of FIG. 3 is a schematic side view of a fixed net using the fish net body of the present invention, FIG. 4 is a schematic plan view of another fixed net using the fish net body of the present invention, and FIG. FIG. 4 is a schematic side view of the stationary net of the embodiment of FIG. 1 ... vertical rope, 2 ... horizontal rope, 3 ... knot, 4 ... piezoelectric vibrator, 5 ... electrode, 6 ... inner electrode, 7, 8 ... coated conductive wire, 9, 10 ... conductor, 11 ... insulator, 12 ... fish net body.

Claims (5)

(57) [Claims] 1. A cylindrical ceramic piezoelectric vibrator having an outer electrode mounted on an outer surface and an inner electrode mounted on an inner surface is passed through a rope having a conductive wire therein, and the conductive wire of the rope is connected to the ceramic piezoelectric vibrator. The outer electrode and the inner electrode of the element are connected to each other, and a rope covered with an insulator is formed around the ceramic piezoelectric vibrator. The vertical and horizontal meshes are knitted. An ultrasonic fish net, comprising: a fishnet main body configured to have a ceramic piezoelectric vibrator mounted thereon; and applying an AC voltage to the piezoelectric vibrator through a conductive wire of the fishnet main body. 2. An ultrasonic fish net according to claim 1, wherein said fish net main body having said piezoelectric vibrator is incorporated in a part of a fixed net. 3. The ultrasonic fish net according to claim 1, wherein a temperature sensor is mounted on a fixed net incorporating said fish net main body. 4. An ultrasonic fish net according to claim 1, wherein a PH sensor is mounted on a fixed net incorporating said fish net main body. 5. An ultrasonic fish net according to claim 1, wherein a dissolved oxygen sensor is mounted on a fixed net incorporating said fish net.